L5964

量産中

Monolithic dual 3.5 A step-down switching regulator with LDO

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  • L5964 is a dual step-down switching regulator with internal power switches and a low drop-out linear/standby regulator, designed for car battery supplied applications. All the regulators have independent supply voltages, enables pins, power goods and thermal protections.

    The switching regulators have selectable voltage supervisors and power goods, and selectable current limits. The LDO has power good and fixed current limitation.
    The PMIC finds application in different automotive systems, where load dump protection and wide input voltage range are mandatory.
    Typically, the regulator connected to the battery works at low frequency, while the one connected to the pre-regulated voltage can make the most of the high frequency operation. In this way the efficiency of the system is improved and the ability of the product to function both as a pre- and post-regulator is exploited.
    For the same reason, in applications where both regulators must be connected to a battery, for example when powering a hub consisting of two USB ports, it is recommended to work at the lowest frequency. The linear regulator that remains available can be used to power the controller.
    The two DC-DC converters can work in free-run condition, with frequency selectable between two values, 270 kHz or 2.2 MHz, or synchronize themselves to an external clock (SYNCIN pin). They are 180° out of phase, while the synchronization output signal (SYNCOUT pin) is 90° out of phase with the first regulator. The phase shift simplifies the use of two ICs in the same application (4 DC/DCs regulators).
    The high operating frequency allowed by the synchronization input helps to reduce AM and FM interferences and grants the use of small and low cost inductors and capacitors.
    The two switching regulators can be used in parallel and increase the output current capability up to 7 A.
    The L5964 can work in two different modes, normal and microcontroller mode, based on the condition of a hardware pin.
    When the microcontroller mode is selected, some pins change functionality. For example, the reset and watchdog functions are available. In this way the PMIC easily manages the power management of a microcontroller.
    The availability of power good and enable signals, however, makes easy to manage the system power up sequence even without the presence of a microcontroller, since it is possible to enable a voltage only when the previous voltage is stable and with a precise delay.
    The total quiescent current, when both DC/DCs and LDO are disabled, is less than 10 μA.
    The product is available in LQFP64 with exposed pad up. This package is able to dissipate power through an external heatsink.

    主な特徴

    • AEC-Q100 qualified
    • Two step-down synchronous switching voltage regulators with internal power switches:
      • Wide operating input voltage range (from 3.3 V to 26 V)
      • Output voltage selectable by external divider (feedback voltage at 0.9 V)
      • 0.9 V minimum output, maximum output limited by maximum Duty Cycle
      • DC/DCs can work in Low Power Mode for reduced current consumption in low output Load
      • Internal high-side/ low-side NDMOS
      • 270 kHz and 2.2 MHz selectable free-run frequencies
      • 125 kHz < f < 2.3 MHz synchronization range at SYNCIN pin
      • Programmable current limits at 2 A and 4 A
      • Independent hardware enabling pins
      • Independent supply inputs
      • 180° phase shift between outputs
      • Synch out 90 ° phase shift vs DC-DC1
      • Programmable switching frequency divider by 1, 2, 4, 8 between the two regulators
      • The two regulators can be paralleled
    • Independent voltage supervisors/power-goods with selectable thresholds through external pin:
      • two available thresholds for UV/OV/PG signals: 90-120-95% or 80-110-85% (output voltage percentage)
    • Soft-start, thermal protection
    • One standby/linear regulator:
      • Output selectable with external resistor divider till 10 V
      • Soft start, hardware enable pin
      • 250 mA maximum current capability
      • Standby operative mode
      • Programmable power good thresholds (85% or 95% output voltage percentage)
      • Thermal protection
    • Microcontroller reset with programmable duration, activated by output under voltage or watchdog fault
    • External High Side Driver enable pin
    • One integrated window watchdog (5 ms ≤ window ≤ 50 ms, with ± 20% tolerance)
    • Short circuit protected outputs
    • Low external components number
    • Low EMI
    • Thermal shutdown junction temperature 150°C

サンプル & 購入

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STからオーダー
販売代理店からオーダー
最小
最大
L5964L-VYY LQFP Tray -40 105
量産中
EAR99 MALAYSIA 2.9 / 1k 購入 在庫チェック

販売代理店在庫L5964L-VYY

代理店名
地域 在庫 最小発注 パートナー企業リンク
MOUSER WORLDWIDE 60 1 発注する

代理店レポートによる在庫データ: 2020-05-27

代理店名

MOUSER

在庫

60

Min.Order

1

地域

WORLDWIDE 発注する

代理店レポートによる在庫データ: 2020-05-27

L5964Q-V0Y VFQFPN 48 7x7x1.0 Tray -40 105
開発中
EAR99 THAILAND 2.4 / 1k

販売代理店に在庫がない場合は、STのセールスオフィスまでお問い合わせください

L5964L-VYY

パッケージ

LQFP

梱包タイプ

Tray

Budgetary Price (US$)*/Qty

2.9 / 1k

販売代理店在庫L5964L-VYY

代理店名
地域 在庫 最小発注 パートナー企業リンク
MOUSER WORLDWIDE 60 1 発注する

代理店レポートによる在庫データ: 2020-05-27

代理店名

MOUSER

在庫

60

Min.Order

1

地域

WORLDWIDE 発注する

代理店レポートによる在庫データ: 2020-05-27

Operating Temperature (°C)

(最小)

-40

(最大)

105

製品ステータス

量産中

Budgetary Price (US$)* / Qty

2.9 / 1k

ECCN (US)

EAR99

Country of Origin

MALAYSIA

L5964Q-V0Y

パッケージ

VFQFPN 48 7x7x1.0

梱包タイプ

Tray

Budgetary Price (US$)*/Qty

2.4 / 1k

Operating Temperature (°C)

(最小)

-40

(最大)

105

製品ステータス

開発中

Budgetary Price (US$)* / Qty

2.4 / 1k

ECCN (US)

EAR99

Country of Origin

THAILAND

(*)概算用の希望小売単価(US$)です。現地通貨でのお見積りについては、STのセールス・オフィスまたは販売代理店までお問い合わせください。

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    • 製品型番

      Digitally controlled DC-DC converter with L5964 for automotive applications

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技術文書

    • 概要 バージョン サイズ アクション
      DS12453
      Automotive monolithic dual 3.5 A step-down switching regulator with LDO
      2.0
      1.01 MB
      PDF
      DS12453

      Automotive monolithic dual 3.5 A step-down switching regulator with LDO

    • 概要 バージョン サイズ アクション
      AN5362
      Digitally controlled DC-DC converter with L5964 for automotive applications
      1.0
      1.94 MB
      PDF
      AN5362

      Digitally controlled DC-DC converter with L5964 for automotive applications

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製品型番 製品ステータス パッケージ グレード RoHSコンプライアンスグレード 材料宣誓書**
L5964L-VYY
量産中
LQFP Automotive Ecopack2
L5964Q-V0Y
開発中
VFQFPN 48 7x7x1.0 Automotive Ecopack2

L5964L-VYY

Package:

LQFP

Material Declaration**:

PDF XML

Marketing Status

量産中

Package

LQFP

Grade

Automotive

RoHS Compliance Grade

Ecopack2

L5964Q-V0Y

Package:

VFQFPN 48 7x7x1.0

Material Declaration**:

PDF XML

Marketing Status

開発中

Package

VFQFPN 48 7x7x1.0

Grade

Automotive

RoHS Compliance Grade

Ecopack2

(**) st.comで提供している材料宣誓書は、パッケージ・ファミリ内で最も一般的に使用されているパッケージに基づく汎用ドキュメントの場合があります。そのため、特定の製品では100%正確ではない可能性があります。特定の製品情報については、セールスサポートまでお問い合わせください